Torque-actuated expansible shaft assembly for roll core
US5490640A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1994 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Aug 10, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/1095
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An expansible shaft assembly has core-engagement shoes pivotally mounted to a shaft for pivoting outwardly into tight engagement with the interior of a roll core automatically in response to the application of torque to the shaft. The core-engagement shoes have core-engaging surfaces, some being pivotable outwardly in response to torque applied to the shaft in one axial direction and others being pivotable outwardly in response to torque applied in the opposite axial direction. The respective oppositely-actuated core-engaging surfaces can both be on the same engagement shoe or, alternatively, on different shoes spaced axially along the shaft. For maximizing the speed with which the core-engagement shoes engage the core in response to torque application, the core-engaging surfaces are preferably angularly offset significantly from a radial direction extending between the axis of rotation of the shaft and the pivot axis of the engagement shoe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.